反应详情

A solution of 26.6 g of potassium hydroxide in 50 cc of water is added to a solution of 41.5 g of crude α-hydroxy-2-isopropyl-α-methyl-5-indanacetic acid methyl ester in 500 cc of methanol, and the mixture is boiled at reflux for 11/2 hours. The solution is concentrated, diluted with water and extracted with ether in order to remove the neutral components. The aqueous phase is then acidified with hydrochloric acid, extracted with ether, the ether extract is washed with water, dried over sodium sulphate and concentrated by evaporation. The resulting α-hydroxy-2-isopropyl-α-methyl-5-indanacetic acid is recrystallized from ether/hexane and has a M.P. of 126°-130°.

1. temperatureat reflux for 11/2 hours
2. concentrationThe solution is concentrated
3. additiondiluted with water
4. extractionextracted with ether in order
5. customto remove the neutral components
6. extractionextracted with ether
7. extractionthe ether extract
8. washis washed with water
9. dry with materialdried over sodium sulphate
10. concentrationconcentrated by evaporation
11. customThe resulting α-hydroxy-2-isopropyl-α-methyl-5-indanacetic acid is recrystallized from ether/hexane